Oil motor



F. LANG 0,11. MOTOR May 20, 1930.

. Filed Feb. 11, 1927 F/g.4 I

Fig. Z

meme May 2o, 1930 l PATENT i 4.or-flner: f

nmz LANG, or nomen-maximum, aannam?, Assioma sono animi- GESELLSCHUT, OEAM HG1,

l Ommeren l L Application V'led. l'ebriiary 11,'Seria1 No.

This invention relates to an oil motor-provided with a hollow space inthe piston)` 'servg as additional compression space, as disc osed in mycopending application Serial No. f

In order to avoid the necessity of elongatinglthe piston for theaccommodation of the ho ow space as slightly as possible, said hollowspace is made, annular according to theI- present invention, whereby atthe same time the advantage is obtained, that the additional compressionspace is not disposed directly I'abovethe point vof attachment of thepistonv rod. Moreover between said point of attachl ment and theadditionalcombustion space a higher stratum of airj is present whichinsulates said point of attachment against the heat radiatlon of theadditional compression space. l In the accompanying drawing,illustrating the subject matter of the invention by Away of example, Y

Fig. 1 shows the upper pagt of a cylinder in longitudinal section,

Fig. 2 is a cross section on the line :v -w of Fig. 1.

Fig. 3 shows a modification in longitudinal lsection and Fig. 4 is acrosssection on the line y-fy ofF1g.3. I In the drawing the .referencecharacterv a indicates the cylinder, b 'the piston and the additionalcompression s ace provided .with-- in said piston. This additionalcompression spacel has an annular shape and its crosssec' tion islreduced in upward direction, so .that a slit d is formed, which also hasannular shape and connects the space rrwith'theY ri, 'mary combustionspace- 'e' of the cylin er. 40 The annu ar slit or channel isffunnel4like enlarged n front'ofthe'red'uction or throt-` tling reriction in order to favor the mixing `of the fuel with the air. The fuelvnozzle'f is disposed in the center o f the cylinder head and arrangedin such a manner that the fuel passes in the 4shape of a conicalmantleor `veil and in uniform distribution toward the annular channel d'of the additional compression splace. The injection can be efected withor wit out compressed air. -Suitab1y,.tho nozthe,.pi ston,

"lets'zsf and meemuy rem-nary ia, 192e.

zle fis made vertically adjustable in its central-axis, in order toadjust saidnozzle. in accordance with the position of the piston,corresponding to the moment of injection in such a manner, that the jetsj f fuelare-safety guided' toward the annula channel d. As 4may'befseenfrom Fig. lla bigh'airaspace is provided above the point'of attachmentof y the Apiston rod,- so that said point' of .attachment is protectedagainst the head radiationof the additionalcombustion space c. The

operation of the present engine-is substantially the same as theoperation of the engine disclosed in my copendmg application SerialNo'.` 28,899. 65-

' In'order to enable a further shorteningof the piston, a furtheradditional compression space g is` arranged within the annular space cin the modification illustrated in Figs.` 3 and 4, said furtheradditional compression space g being connected with the compression andcombustion space i of the l cylinder by means ofa reduced aperture or Ythrottling restriction la.. this case the nozzle f has/afurther bore,arranged in the cenitrall axis of the needle and adapted to injectl Y.

fuel toward vthe space g. e. If desired, the additional compressionspace can-be formed as a-special body inserted into which inserted bodycan bel easily so exchanged. Instead of the annular channel g severalfunnel-shaped openings arranged in 'a' circle can connect. the twocompression spaces.-

In theillustrated forms of construction the motor is disclosed as atwo-cycle motor, that means the feeding of the air andthe discharge ofthecombustion gases are regulated by the piston by means 'of slots. Theinvention of course can 4be applied also to allengines in which separateregulated valves for the feed.

mg of lair andithgl exhaustof the combustion Y gases .are required ofthese engines the fourcycle enginesv are the most cnnmon. I'cl'aimfY IV1 1. A combustion engine with self-ignition, comprisinga Vcylinder and apistor\recipro Acatingtherein, said 'piston being provided with anannular compressionl spacearrangedj therewithin and connected by aring-shaped aperture of reduced cross-section with the compression spaceof the cylinder. Y fr 2. A combustion engine with self-ignition,comprising a cylinder and a piston reciprocating therein, said pistonbeing provided with an annular compression space arranged therewithinand connected by a ring-shaped aperture of reduced cross-section withthe compression space of the cylinder, said ringshaped aperture having afunnel-like enlarge ment opening outwardl 3. A combustion engine withself-ignition, comprising a cylinder and a piston reciprocating therein,-said piston being provided With an annular compression space arrangedtherewithin an'd a central hollow space, both.

spaces beirfg connected in the same manner with the compression spacedof the cylinder.

4. A combustion engine with self-ignition comprising a cylinder, apiston reciprocating therein, said piston being provided with anAannular com ression space arranged there-

